diff --git a/libs/tools.py b/libs/tools.py
index 6bfec8c..bee29d8 100644
--- a/libs/tools.py
+++ b/libs/tools.py
@@ -1,6 +1,9 @@
-from bundlewrap.exceptions import NoSuchGroup, NoSuchNode
 from ipaddress import ip_address, IPv4Address
 
+from bundlewrap.exceptions import NoSuchGroup, NoSuchNode
+from bundlewrap.utils.text import bold, red
+from bundlewrap.utils.ui import io
+
 def resolve_identifier(repo, identifier):
     """
     Try to resolve an identifier (group or node). Return a set of ip
@@ -13,9 +16,20 @@ def resolve_identifier(repo, identifier):
             nodes = repo.nodes_in_group(identifier)
         except NoSuchGroup:
             try:
-                return {ip_address(identifier)}
-            except:
-                return set()
+                ip = ip_address(identifier)
+
+                if isinstance(ip, IPv4Address):
+                    return {'ipv4': {ip}, 'ipv6': set()}
+                else:
+                    return {'ipv4': set(), 'ipv6': {ip}}
+            except Exception as e:
+                io.stderr('{x}  {t} Exception while resolving "{i}": {e}'.format(
+                    x=red('✘'),
+                    t=bold('libs.tools.resolve_identifier'),
+                    i=identifier,
+                    e=str(e),
+                ))
+                return {'ipv4': set(), 'ipv6': set()}
 
     found_ips = set()
     for node in nodes: